618346909 has 2 divisors, whose sum is σ = 618346910. Its totient is φ = 618346908.

The previous prime is 618346891. The next prime is 618346913. The reversal of 618346909 is 909643816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 572405625 + 45941284 = 23925^2 + 6778^2 .

It is a cyclic number.

It is not a de Polignac number, because 618346909 - 2¹⁷ = 618215837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618346969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309173454 + 309173455.

It is an arithmetic number, because the mean of its divisors is an integer number (309173455).

Almost surely, 2^618346909 is an apocalyptic number.

It is an amenable number.

618346909 is a deficient number, since it is larger than the sum of its proper divisors (1).

618346909 is an equidigital number, since it uses as much as digits as its factorization.

618346909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 618346909 is about 24866.5821736724. The cubic root of 618346909 is about 851.9433776392.

The spelling of 618346909 in words is "six hundred eighteen million, three hundred forty-six thousand, nine hundred nine".